【摘 要】
：
Herein,a series of niobium oxide supported cerium nanotubes (CeNTs) catalysts with dif-ferent loading amount of Nb2O5 (0-10 wt％) were prepared and used for selective catalytic reduction of NOx with NH3 (NH3-SCR) in the presence of CH2Cl2.Commercial V2O5-W
【机 构】
：
Key Laboratory of Environment Remediation and Ecological Health,Ministry of Education,College of Env
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Herein,a series of niobium oxide supported cerium nanotubes (CeNTs) catalysts with dif-ferent loading amount of Nb2O5 (0-10 wt％) were prepared and used for selective catalytic reduction of NOx with NH3 (NH3-SCR) in the presence of CH2Cl2.Commercial V2O5-WO3-TiO2 catalyst was also prepared for comparison.The physcial properties and chemical prop-erties of the Nb2O5 loaded cerium nanotubes catalysts were investigated by X-ray diffrac-tometer,Transmission electron microscope,Brunauer-Emmett-Teller specific surface area,H2-temperature programmed reduction,NH3-temperature programmed desorption and X-ray photoelectron spectroscopy.The experiment results showed that the loading amount of Nb2O5 had a significant effect on the catalytic performance of the catalysts.10 wt.％Nb-CeNTs catalyst presented the best NH3-SCR performance and degradation efficiency of CH2Cl2 among the prepared catalysts,due to its superior redox capability,abundant surface oxygen species and acid sites,the interaction between Nb and Ce,higher ratio of Nb4+/(Nb5+ + Nb4+) and Ce3+/(Ce3+ + Ce4+),as well as the special tubular structure of cerium nanotube.This study may provide a practical approach for the design and synthesis of SCR catalysts for the simultaneously removal NOx and chlorinated volatile organic compounds(CVOCs) emitted from the stationary industrial sources.
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